Home / 215,930.51-321,679.65-206,215.15

Finding the Fourth Proportional to 215,930.51, 321,679.65 and 206,215.15

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Solution

The fourth proportional to 215,930.51, 321,679.65 and 206,215.15 is: 307,206.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,930.51 : 321,679.65 = 206,215.15 : x
  2. Step 2: Convert to fraction form
    215,930.51/321,679.65 = 206,215.15/x
  3. Step 3: Cross multiply
    215,930.51x = 321,679.65 × 206,215.15
  4. Step 4: Simplify right side
    215,930.51x = 66,335,216,245.62
  5. Step 5: Solve for x
    x = 66,335,216,245.62/215,930.51
  6. Step 6: Final answer
    x = 307,206.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.